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Relationships Between HCl, H2O, Aerosols, and Temperature in the Martian Atmosphere: 1. Climatological Outlook
Patel, M. R.; Montmessin, F.; Fedorova, A. A. +15 more
Detecting trace gases such as hydrogen chloride (HCl) in Mars' atmosphere is among the primary objectives of the ExoMars Trace Gas Orbiter (TGO) mission. Terrestrially, HCl is closely associated with active volcanic activity, so its detection on Mars was expected to point to some form of active magmatism/outgassing. However, after its discovery us…
The Infrared Auroral Footprint Tracks of Io, Europa and Ganymede at Jupiter Observed by Juno-JIRAM
Altieri, F.; Sindoni, G.; Piccioni, G. +20 more
The electromagnetic coupling between the Galilean satellites at Jupiter and the planetary ionosphere generates an auroral footprint, which is detected with high spatial resolution in the infrared L band by the Jovian InfraRed Auroral Mapper (JIRAM) onboard the Juno spacecraft. We report the JIRAM data acquired since 27 August 2016 until 23 May 202…
Relationships Between HCl, H2O, Aerosols, and Temperature in the Martian Atmosphere: 2. Quantitative Correlations
Patel, M. R.; Montmessin, F.; Fedorova, A. A. +15 more
The detection of hydrogen chloride (HCl) in the atmosphere of Mars was among the primary objectives of the ExoMars Trace Gas Orbiter (TGO) mission. Its discovery using the Atmospheric Chemistry Suite mid-infrared channel (ACS MIR) showed a distinct seasonality and possible link to dust activity. This paper is part 2 of a study investigating the li…
The Morphology of Martian Pyroclastic Ramparts and Their Use in Determining Vent-Proximal Eruption Dynamics
Wilson, L.; Pieterek, B.; Jones, T. J.
High-resolution investigations of Late Amazonian volcanic landforms provide previously unrevealed insights into the dynamics of Martian volcanic eruptions. On Earth, the formation of vent-proximal accumulations of spatter deposits is attributed to low-intensity lava fountaining episodes representing eruptions on the very edge of explosive activity…
Deciphering Martian Flood Infiltration Processes at Hebrus Valles: Insights From Laboratory Experiments and Remote Sensing Observations
Séjourné, A.; Kargel, J. S.; Costard, F. +2 more
In evaluating the unique geomorphology of Hebrus Valles on Mars, an outflow channel southeast of Utopia Planitia, we investigated the role of fluvial dynamics in forming subsurface conduits. Unlike typical Martian channels that terminate under younger sediment rocks, Hebrus Valles retains its downstream features, thus offering a window into surfac…
An Orbital Comparison of a Late Mantling Unit on Aeolis Mons With Other Erosion-Resistant Strata Explored by MSL in Gale Crater, Mars
Bennett, K.; Kite, E.; Bryk, A. B. +7 more
Previous investigations along Curiosity's traverse in Gale crater have explored the relationship between orbital and in situ observations. This work aims to better understand the geologic environment of units only observable from orbit and compare them to the properties of units examined by Curiosity. Here, we map an erosion-resistant dark-toned m…
Water-Ice Dominated Spectra of Saturn's Rings and Small Moons From JWST
Fletcher, L. N.; Hedman, M. M.; Showalter, M. R. +11 more
JWST measured the infrared spectra of Saturn's rings and several of its small moons (Epimetheus, Pandora, Telesto, and Pallene) as part of Guaranteed Time Observation program 1247. The NIRSpec instrument obtained near-infrared spectra of the small moons between 0.6 and 5.3 microns, which are all dominated by water-ice absorption bands. The shapes …
Unraveling the Tectonic History of the Tharsis Rise on Mars: Plume Migration and Critical Taper Dome
Karagoz, Oguzcan; Kenkmann, Thomas; Hergarten, Stefan
Wrinkle ridges are widespread tectonic landforms that serve as paleo-strain and paleo-stress indicators of the compressional history and thermal evolution of Mars. To reconstruct the center of the Tharsis rise and its migration with time, we mapped wrinkle ridges in the periphery of the dome and analyzed 34,741 wrinkle ridge segments with a total …
Morphological and Structural Characterization of Shortening Landforms on Mars
Klimczak, Christian; McCullough, Leta R.; Crane, Kelsey T. +1 more
The lithosphere of Mars accommodates horizontal shortening through folding and faulting, producing landforms described as wrinkle ridges or lobate scarps. Despite this nomenclature, we lack a deep understanding of the drivers of morphological differences observed between landform types. This study aims to develop a quantitative model for shortenin…
The Venus Global Ionosphere-Thermosphere Model (V-GITM): A Coupled Thermosphere and Ionosphere Formulation
Bougher, Stephen W.; Ridley, Aaron J.; Ponder, Brandon M. +2 more
This paper introduces the new Venus global ionosphere-thermosphere model (V-GITM) which incorporates the terrestrial GITM framework with Venus-specific parameters, ion-neutral chemistry, and radiative processes in order to simulate some of the observable features regarding the temperatures, composition, and dynamical structure of the Venus atmosph…